Zhou Linjie, Ye Tong, Chen Jianping
State Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai, China.
Opt Express. 2011 Apr 25;19(9):8032-44. doi: 10.1364/OE.19.008032.
We propose a novel waveguide self-coupling based reconfigurable resonance structure that works as a flat-top second-order tunable filter and a tunable delay line with low group delay dispersion. The high-order resonance features result from the mutual mode coupling between the clockwise and counter-clockwise resonance eigenmodes. The transfer-matrix method is used to theoretically analyze the device optical performances. The relations between the two embedded phase shifters for achieving flat-top filtering and group delay responses are given. As the coupled resonances are provided by only one physical resonator, the device is inherently more compact and resilient to fabrication errors compared to conventional microring resonators. Phase tuning for its reconfiguration is also simpler and more power-efficient.
我们提出了一种基于新型波导自耦合的可重构谐振结构，该结构可作为具有低群时延色散的平顶二阶可调滤波器和可调延迟线。高阶谐振特性源于顺时针和逆时针谐振本征模之间的相互模式耦合。采用传输矩阵法对器件的光学性能进行理论分析。给出了用于实现平顶滤波和群时延响应的两个嵌入式移相器之间的关系。由于仅由一个物理谐振器提供耦合谐振，与传统微环谐振器相比，该器件本质上更紧凑，并且对制造误差更具弹性。其重构的相位调谐也更简单且更节能。
